Predicting grain yield and protein content in winter wheat at different N supply levels using canopy reflectance spectra
文献类型：期刊论文
| 作者 | Xue Li-Hong; Cao Wei-Xing; Yang Lin-Zhang |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2007-10-01 |
| 卷号 | 17期号:5页码:646-653 |
| 关键词 | grain protein content grain yield soil N supply vegetation index wheat |
| ISSN号 | 1002-0160 |
| 通讯作者 | Cao Wei-Xing(caow@njau.edu.cn) |
| 英文摘要 | A field experiment using a split-plot randomized complete block design with three replications was carried out to determine relationships between spectral indices and wheat grain yield (GY), to compare the performance of four vegetation indices (VIs) for GY prediction, and to study the feasibility of VI to estimate grain protein content (GPC) in winter wheat. Two typical winter wheat (Triticum aestivum L.) cultivars 'Xuzhou 26' (high protein content) and 'Huaimai 18' (low protein content) were used as the main plot treatments and four N rates, i.e., 0, 120, 210, and 300 kg N ha(-1), as the sub-plot treatments. Increasing soil N supply significantly increased GY and GPC (P <= 0.05). For the two cultivars combined, significant and positive correlations were found between four VIs and GY, with the strongest relationship observed when using the green ratio vegetation index (GRVI) at mid-filling. Cumulative VI estimates improved yield predictions substantially, with the best interval being heading to maturity stage. Similar results were found between VI and grain protein yield. However, when using cumulative VI, GPC showed no significant improvement. The strong relationship between leaf N status and GPC (R-2 = 0.9144 for 'Xuzhou 26' and R-2 = 0.8285 for 'Huaimai 18') indicated that canopy spectra could be used to predict GPC. The strong fit between estimated and observed GPC (R-2 = 0.7939) indicated that remote sensing techniques were potentially useful predictors of grain protein content and quality in wheat. |
| 收录类别 | SCI |
| WOS关键词 | SEASON PREDICTION ; NITROGEN STATUS ; WATER-STRESS ; INDEXES ; IMAGERY |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000249943600013 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558707 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Cao Wei-Xing |
| 作者单位 | 1.Nanjing Agr Univ, Minist Agr, Key Lab Crop Growth Regulat, Nanjing 210095, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue Li-Hong,Cao Wei-Xing,Yang Lin-Zhang. Predicting grain yield and protein content in winter wheat at different N supply levels using canopy reflectance spectra[J]. PEDOSPHERE,2007,17(5):646-653. |
| APA | Xue Li-Hong,Cao Wei-Xing,&Yang Lin-Zhang.(2007).Predicting grain yield and protein content in winter wheat at different N supply levels using canopy reflectance spectra.PEDOSPHERE,17(5),646-653. |
| MLA | Xue Li-Hong,et al."Predicting grain yield and protein content in winter wheat at different N supply levels using canopy reflectance spectra".PEDOSPHERE 17.5(2007):646-653. |
入库方式： iSwitch采集
来源：南京土壤研究所
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